using System;
using iTextSharp.text.pdf;
/*
 * $Id: PdfReaderContentParser.cs 318 2012-02-27 22:46:07Z psoares33 $
 *
 * This file is part of the iText project.
 * Copyright (c) 1998-2012 1T3XT BVBA
 * Authors: Bruno Lowagie, Kevin Day, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * you must retain the producer line in every PDF that is created or manipulated
 * using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */

namespace iTextSharp.text.pdf.parser {

    /**
     * A utility class that makes it cleaner to process content from pages of a PdfReader
     * through a specified RenderListener.
     * @since 5.0.2
     */
    public class PdfReaderContentParser {
        /** the reader this parser will process */
        private PdfReader reader;
        
        public PdfReaderContentParser(PdfReader reader) {
            this.reader = reader;
        }

        /**
         * Processes content from the specified page number using the specified listener
         * @param <E> the type of the renderListener - this makes it easy to chain calls
         * @param pageNumber the page number to process
         * @param renderListener the listener that will receive render callbacks
         * @return the provided renderListener
         * @throws IOException if operations on the reader fail
         */
        
        public E ProcessContent<E>(int pageNumber, E renderListener) where E : IRenderListener {
            PdfDictionary pageDic = reader.GetPageN(pageNumber);
            PdfDictionary resourcesDic = pageDic.GetAsDict(PdfName.RESOURCES);
            
            PdfContentStreamProcessor processor = new PdfContentStreamProcessor(renderListener);
            processor.ProcessContent(ContentByteUtils.GetContentBytesForPage(reader, pageNumber), resourcesDic);        
            return renderListener;
        }
    }
}